Question

The reagent which can distinguish propanal and propanone Tollen's reagent is:

• A. Tollen's reagent
• B. Benedict's reagent
• C. Fehling's reagent
• D. All of these

Answer 1

The correct option is D All of these

Tollen's reagent, Bennedict solution and Fehling solution are all used to distinguish between aldehydes and ketones. Propanal( $C{H}_{3}CHO$) is an aldehyde and thus gives positive test with all the three reagents whereas propanone( $C{H}_{3}COC{H}_3$) is a ketone and thus does not give any results with the three reagents.